<?php

/**
 * @file
 * Provide views data and handlers for book.module
 */
/**
 * @defgroup views_book_module book.module handlers
 *
 * @{
 */

/**
 * Implementation of hook_views_data()
 */
function book_views_data() {
    // ----------------------------------------------------------------------
    // book table

    $data['book']['table']['group'] = t('Book');
    $data['book']['table']['join'] = array(
        'node' => array(
            'left_field' => 'nid',
            'field' => 'nid',
        ),
    );

    $data['book']['bid'] = array(
        'title' => t('Top level book'),
        'help' => t('The book the node is in.'),
        'relationship' => array(
            'base' => 'node',
            'handler' => 'views_handler_relationship',
            'label' => t('Book'),
        ),
            // There is no argument here; if you need an argument, add the relationship
            // and use the node: nid argument.
    );

    // ----------------------------------------------------------------------
    // menu_links table -- this is aliased so we can get just book relations
    // Book hierarchy and weight data are now in {menu_links}.
    $data['book_menu_links']['table']['group'] = t('Book');
    $data['book_menu_links']['table']['join'] = array(
        'node' => array(
            'table' => 'menu_links',
            'left_table' => 'book',
            'left_field' => 'mlid',
            'field' => 'mlid',
        ),
    );

    $data['book_menu_links']['weight'] = array(
        'title' => t('Weight'),
        'help' => t('The weight of the book page.'),
        'field' => array(
            'handler' => 'views_handler_field_numeric',
            'click sortable' => TRUE,
        ),
        'sort' => array(
            'handler' => 'views_handler_sort',
        ),
    );

    $data['book_menu_links']['depth'] = array(
        'title' => t('Depth'),
        'help' => t('The depth of the book page in the hierarchy; top level books have a depth of 1.'),
        'field' => array(
            'handler' => 'views_handler_field_numeric',
            'click sortable' => TRUE,
        ),
        'sort' => array(
            'handler' => 'views_handler_sort',
        ),
        'filter' => array(
            'handler' => 'views_handler_filter_numeric',
        ),
        'argument' => array(
            'handler' => 'views_handler_argument',
        ),
    );

    $data['book_menu_links']['p'] = array(
        'title' => t('Hierarchy'),
        'help' => t('The order of pages in the book hierarchy.'),
        'sort' => array(
            'handler' => 'views_handler_sort_menu_hierarchy',
        ),
    );

    // ----------------------------------------------------------------------
    // book_parent table -- this is an alias of the book table which
    // represents the parent book.
    // The {book} record for the parent node.
    $data['book_parent']['table']['group'] = t('Book');
    $data['book_parent']['table']['join'] = array(
        'node' => array(
            'table' => 'book',
            'left_table' => 'book_menu_links',
            'left_field' => 'plid',
            'field' => 'mlid',
        ),
    );

    $data['book_parent']['nid'] = array(
        'title' => t('Parent'),
        'help' => t('The parent book node.'),
        'relationship' => array(
            'base' => 'node',
            'base field' => 'nid',
            'handler' => 'views_handler_relationship',
            'label' => t('Book parent'),
        ),
    );

    return $data;
}

/**
 * @}
 */
